condition	mean	min	max
4 h after light	15.5816	14.4575	16.7057
8 h after light	17.19115	16.7661	17.6162
12 h after light	13.91245	13.0655	14.7594
4 h after dark	20.7273	17.8808	23.5738
8 h after dark	17.97215	16.8087	19.1356
12 h after dark	18.6403	17.1775	20.1031